. >> at&t. >> metro pcs. >> we never tell anybody. >> reporter: bill moore can help. uses only store bought unmodified thongs indoors and outside and while driving. >> we put software on it that helps automate test. the test we run are calls and up load and download data test. >> reporter: employees travel around the nation recording the data and transferring it to free maps you can access. that general information is not specific to how you use your phone. >> for some people, all they want that phone for is for calling. other people all they care about is data services. if i'm a teenage, i probably only care about texting. >> reporter: there's a free metrics app for apple or android. it will allows consumers to immediately check signal strength from right where they are, compare other coverage and report dead spots. the more people who use it, all of that combined data makes it more accurate. >> what the crowd and the consumer provides here is much more of a realtime level of information and many more places and kind of all the time. >> reporter: that's because many factors affec
